CN111321780A

CN111321780A - Water supply and drainage integrated module and water supply and drainage system of building

Info

Publication number: CN111321780A
Application number: CN202010148877.0A
Authority: CN
Inventors: 李景生; 林晓鹏
Original assignee: Shenzhen Huasheng Construction Engineering Co ltd
Current assignee: Shenzhen Huasheng Construction Group Co.,Ltd.
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-06-23
Anticipated expiration: 2040-03-05
Also published as: CN111321780B

Abstract

The invention relates to a water supply and drainage integrated module and a water supply and drainage system of a building, which comprise pipeline blocks fixed on the building, wherein sewage pipes, rainwater pipes and water inlet pipes are embedded in the pipeline blocks; the two ends of the main drainage pipe are respectively detachably connected with the end parts of the sewage pipes on the adjacent pipeline blocks, and the main drainage pipe is hermetically connected with the sewage pipes; the two ends of the main rain drainage pipe are respectively detachably connected with the end parts of the rain pipes on the adjacent pipeline blocks, and the main rain drainage pipe is hermetically connected with the rain pipes; the both ends of delivery pipe are connected with the inlet tube in the adjacent pipeline block respectively can dismantle, and delivery pipe and inlet tube sealing connection. The invention has the effect of preventing the maintenance work from influencing the lower decorative surface.

Description

Water supply and drainage integrated module and water supply and drainage system of building

Technical Field

The invention relates to the technical field of water supply and drainage, in particular to a water supply and drainage integrated module and a water supply and drainage system of a building.

Background

The water supply and drainage pipeline of the traditional building is usually arranged in the building, a main drainage pipeline penetrates through each floor, if the problems of unsmooth drainage, silting and the like occur due to improper use of residents, the maintenance needs to be carried out to the lower layer due to the fact that a maintenance port of the main drainage pipeline is arranged at the lower-layer ceiling, and the problems of damage to the decorative surface of the lower layer, pollution to the lower layer and the like are caused.

In addition, when a certain department of main drainage pipe takes place to block up, the sewage that blocks up the discharge of department upside can't pass through main drainage pipe, then can pile up in main drainage pipe, this moment, if the resident of jam department upside continues to discharge domestic sewage, then can lead to accumulational sewage in the main drainage pipe to get into in the nearest upper floor of jam department, lead to sewage to flow backward through facilities such as toilet bowl, floor drain, greatly influenced the life of this floor resident, can lead to the incident even.

Disclosure of Invention

In view of the shortcomings of the prior art, it is an object of the present invention to provide a water supply and drainage integrated module, which has the effect of preventing maintenance work from affecting the lower decoration surface.

The above object of the present invention is achieved by the following technical solutions:

a water supply and drainage integrated module comprises pipeline blocks fixed on the outer wall of a building through concrete pouring, wherein sewage pipes, rainwater pipes and water inlet pipes are horizontally arranged in the pipeline blocks, a plurality of pipeline blocks are arranged on the same building, the pipeline blocks are respectively aligned with each floor slab of the building, and a main drainage pipe communicated with an indoor drainage pipeline of the building, a main drainage rainwater pipe communicated with a roof drainage pipeline and a water supply pipe communicated with an indoor water pipeline of the building are arranged between every two adjacent pipeline blocks; the two ends of the main drainage pipe are respectively detachably connected with the end parts of the sewage pipes on the adjacent pipeline blocks, and the main drainage pipe is hermetically connected with the sewage pipes; the two ends of the main rain drainage pipe are respectively detachably connected with the end parts of the rain pipes on the adjacent pipeline blocks, and the main rain drainage pipe is hermetically connected with the rain pipes; the both ends of the water supply pipe are respectively detachably connected with the adjacent water inlet pipes in the pipeline block, and the water supply pipe is hermetically connected with the water inlet pipes.

Through adopting above-mentioned technical scheme, when taking place to block up in the main drain pipe of a certain floor, maintenance person confirms to block up to take place the main drain pipe of jam and dredge this main drain pipe in building outdoor demolition behind the position, then maintenance person installs this main drain pipe again and can accomplish mediation work, at above-mentioned in-process, need not to demolish and destroy lower floor's decorative cover, and mediation work goes on outside the building, is favorable to preventing lower floor's pollution.

In view of the defects of the prior art, the second object of the present invention is to provide a water supply and drainage system for buildings, which has the effect of preventing sewage in the buildings from flowing backwards.

A water supply and drainage system of a building comprises a water supply and drainage integrated module, a detection assembly arranged on a pipeline block and a control valve assembly buried in the pipeline block, wherein the control valve assembly comprises a first communication pipe, a first electromagnetic valve fixedly arranged on the first communication pipe, a second communication pipe arranged on the lower side of the first communication pipe, a second electromagnetic valve fixedly arranged on the second communication pipe and a third electromagnetic valve fixedly arranged on a rainwater pipe; two ends of the first communicating pipe are respectively communicated with the sewage pipe and the rainwater pipe; two ends of the second communicating pipe are respectively communicated with the sewage pipe and the rainwater pipe; the third electromagnetic valve is positioned between the first communicating pipe and the second communicating pipe along the length direction of the rainwater pipe; the detection assembly comprises detection grooves arranged on the bottom surface of the pipeline block body, detectors arranged in the detection grooves and used for detecting the flow direction of sewage in the sewage pipe, and a controller arranged in one detection groove, wherein the detectors are electrically connected with the controller, and the controller is respectively electrically connected with the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve; and when receiving the sewage reverse flow signal sent by the detector, the controller sends signals to the first electromagnetic valve positioned at the lower side of the detector, the second electromagnetic valve positioned at the upper side of the detector and the third electromagnetic valve positioned at the upper side and the lower side of the detector, and controls the first electromagnetic valve and the second electromagnetic valve to be opened and the third electromagnetic valve to be closed.

By adopting the technical scheme, when a certain main drainage pipe of a building is blocked, sewage is continuously discharged from the floor on the upper side of the main drainage pipe and enters the main drainage pipe, so that the sewage in the main drainage pipe continuously floats up until the sewage enters the sewage pipe communicated with the main drainage pipe, at the moment, the detector detects that the sewage in the sewage pipe flows upwards, the detector sends a signal to the controller, the controller controls the first electromagnetic valve nearest to the lower side of the detector to open, controls the second electromagnetic valve nearest to the upper side of the detector to open and controls the third electromagnetic valves on the upper side and the lower side of the detector to close, at the moment, the sewage flowing backwards into the sewage pipe enters the main drainage pipe through the second communication pipe due to the blockage of the main drainage pipe, then the sewage in the main drainage pipe enters the sewage pipe on the lower side of the detector through the first communication pipe on the lower side of the detector and is discharged through the main drainage pipe on the lower side of the main drainage, therefore, the sewage which flows backwards due to the blockage of the main drainage pipe is prevented from entering the building, and the influence of the sewage which flows backwards on the life of residents on the floors of the building and possible safety accidents are prevented.

The present invention in a preferred example may be further configured to: the detector selects an electromagnetic flowmeter, and is arranged on the lower side of the second communicating pipe closest to the detector along the length direction of the sewage pipe.

Through adopting above-mentioned technical scheme, the electromagnetic flowmeter is used in the selection of detector for detect the interior sewage of sewage pipe and flow backward, and the detector sets up in the second communicating pipe downside that is closest to this detector, thereby when making the detector detect sewage and flow backward, the second communicating pipe that is closest to this detector can in time be opened, prevent that the interior sewage of sewage pipe from continuing up to flow backward, in addition, if the sewage pipe takes place to block up, sewage is piled up and is set up in the main sewer pipe of this sewage pipe upside, the detector of this sewage pipe upside can detect sewage and flow backward equally.

The present invention in a preferred example may be further configured to: an electric button electrically connected with the controller is fixed in the detection groove, and the controller receives a signal of the electric button and controls the third electromagnetic valve nearest to the upper side of the electric button to be opened, controls the third electromagnetic valve nearest to the lower side of the electric button to be closed and controls the first electromagnetic valve nearest to the lower side of the electric button to be opened.

Through adopting above-mentioned technical scheme, when maintainer dredged main drainage pipe, maintainer pressed electric button, electric button trigger control ware, make to be located the nearest third solenoid valve of this electric button upside and open, be located the nearest third solenoid valve of this electric button downside and close and be located the nearest first solenoid valve of this electric button downside and open, then maintainer pours the clear water towards main drainage pipe by the building roof, the clear water has washed the main drainage pipe who has contacted sewage, thereby make the inside of main drainage pipe clean, prevent that it from influencing the emission of rainwater.

The present invention in a preferred example may be further configured to: the first communicating pipe and the second communicating pipe are obliquely arranged, and one end of the first communicating pipe, which is connected with the sewage pipe, is lower than one end of the first communicating pipe, which is connected with the rainwater pipe; one end of the second communicating pipe connected with the sewage pipe is lower than one end of the second communicating pipe connected with the rainwater pipe.

Through adopting above-mentioned technical scheme, first communicating pipe slope sets up, is convenient for discharge remaining sewage in the first communicating pipe to the sewage intraductal, and second communicating pipe slope sets up, is favorable to preventing that the bold filth from remaining and blockking up the second solenoid valve in the second communicating pipe.

The present invention in a preferred example may be further configured to: the detection assembly further comprises LED lamps fixed at the bottoms of the pipeline blocks, the LED lamps are electrically connected with the controller, and the controller sends signals to the LED lamps closest to the detector when receiving the sewage reverse flow signals sent by the detector, so that the LED lamps emit light to prompt maintenance personnel of the blocking position of the main drainage pipe.

Through adopting above-mentioned technical scheme, when the detector sent sewage direction flow signal to the controller on, the controller sent signal to LED lamp for the LED lamp is lighted, thereby has indicateed that maintainer takes place to block up the department and is located the nearest main sewer pipe or the sewage pipe of LED lamp downside.

The present invention in a preferred example may be further configured to: the control valve assembly further comprises a third communicating pipe connected between the water inlet pipe and the rainwater pipe and a fourth electromagnetic valve fixedly installed on the third communicating pipe, and the fourth electromagnetic valve is arranged on the upper side of the third electromagnetic valve; the controller is electrically connected with the fourth electromagnetic valve, and the controller receives the signal of the electric button and controls the fourth electromagnetic valve which is positioned in the same pipeline block body with the electric button to open.

Through adopting above-mentioned technical scheme, when maintenance personal pressed electric button, controller control and this electric button were located the internal fourth solenoid valve of same pipeline block and are opened for in the water release to the rainwater pipe in this pipeline block intake pipe, the downspout of having washd the pollutant, avoid maintenance personal to empty the operation of clear water from the roof, convenient and fast.

In summary, the invention includes at least one of the following beneficial technical effects:

when the main drainage pipe on a certain floor is blocked, a maintenance worker determines the blocking position and then removes the blocked main drainage pipe outside the building and dredges the main drainage pipe, then the maintenance worker installs the main drainage pipe again to finish the dredging work without removing and damaging the decorative surface of the lower layer, and the dredging work is carried out outside the building, so that the lower layer pollution can be prevented;

when a certain main drainage pipe of a building is blocked, the main drainage pipe flows backwards until sewage enters a sewage pipe communicated with the main drainage pipe, at the moment, the detector detects that the sewage in the sewage pipe flows upwards, the detector sends a signal to the controller, the controller controls the first electromagnetic valve nearest to the lower side of the detector to open, controls the second electromagnetic valve nearest to the upper side of the detector to open and controls the third electromagnetic valves on the upper side and the lower side of the detector to close, at the moment, the sewage flowing backwards into the sewage pipe enters the main drainage pipe through the second communication pipe, then the sewage in the main drainage pipe enters the sewage pipe on the lower side of the detector through the first communication pipe on the lower side of the detector and is discharged through the main drainage pipe on the lower side of the main drainage pipe, and therefore the sewage flowing backwards due to the blockage of the main drainage pipe is prevented from entering the building, the sewage which flows backwards is prevented from influencing the life of residents on the building floors and possible safety accidents;

when the maintainer presses the electric button, the electric button triggers the controller to open the third electromagnetic valve closest to the upper side of the electric button, close the third electromagnetic valve closest to the lower side of the electric button and open the first electromagnetic valve closest to the lower side of the electric button, then the maintainer pours clean water towards the main rain drainage pipe from the roof of the building, and the clean water flushes the main rain drainage pipe which contacts sewage, so that the inside of the main rain drainage pipe is clean, and the influence on the drainage of rainwater is prevented.

Drawings

Fig. 1 is a schematic structural diagram of a water supply and drainage integrated module.

Fig. 2 is a schematic arrangement of the piping blocks.

Reference numerals: 11. a pipeline block; 111. a frame; 112. a sewage pipe; 113. a rain pipe; 114. a water inlet pipe; 12. a main drain pipe; 13. a main rain drainage pipe; 14. a water supply pipe; 21. a first communication pipe; 22. a first solenoid valve; 23. a second communicating pipe; 24. a second solenoid valve; 25. a third electromagnetic valve; 26. a third communicating pipe; 27. a fourth solenoid valve; 3. a detection component; 31. a detection tank; 32. a detector; 33. a controller; 34. an electric button; 35. an LED lamp.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the water supply and drainage integrated module disclosed by the present invention includes a pipeline block 11, a main drainage pipe 12, a main rain drainage pipe 13, and a water supply pipe 14. Referring to fig. 2, the pipeline block 11 is rectangular block-shaped and formed by pouring concrete, a frame 111 is embedded in the pipeline block, the frame 111 is made of welded steel bars, the frame 111 is box-shaped, and the pipeline block 11 is fixed to the outer wall of the building by pouring. Still bury in the pipeline block 11 sewage pipe 112, downspout 113 and inlet tube 114, sewage pipe 112 is the pipe form of circle, and its axis is vertical, and sewage pipe 112 both ends wear out pipeline block 11 respectively and are the flange form. The rain pipe 113 is in a shape of a circular pipe, the axis of the rain pipe is vertical, and both ends of the rain pipe 113 penetrate through the pipeline block 11 respectively and are in a flange shape. The water inlet pipe 114 is in a circular pipe shape, the axis of the water inlet pipe is vertical, and two ends of the water inlet pipe 114 respectively penetrate through the pipeline block 11 and are in a flange shape. The sewage pipe 112, the rainwater pipe 113, and the inlet pipe 114 are sequentially arranged along the length direction of the pipe block 11. The pipeline block 11 is equipped with a plurality ofly, and a plurality of pipeline blocks 11 are along the vertical range of building outside wall, and each pipeline block 11 aligns with each floor of building respectively. The main drain pipe 12, the main rain drainage pipe 13 and the water supply pipe 14 are all in a circular pipe shape, the main drain pipe 12, the main rain drainage pipe 13 and the water supply pipe 14 are all made of plastic, and the inner diameters of the main drain pipe 12, the main rain drainage pipe 13 and the water supply pipe 14 are all 100 mm. The main drainage pipe 12 is provided with a plurality of main drainage pipes 12, the main drainage pipes 12 are respectively vertically arranged between the adjacent pipeline blocks 11, the upper end of each main drainage pipe 12 is connected with the lower end of the sewage pipe 112 positioned on the upper side of the corresponding main drainage pipe 12 in a flange sealing manner, and the lower end of each main drainage pipe 12 is connected with the upper end of the sewage pipe 112 positioned on the lower side of the corresponding main drainage pipe 12 in a flange sealing manner. The rain pipe 13 is arranged to owner and is equipped with many, and many owner arrange rain pipe 13 respectively vertical setting between adjacent pipeline block 11, and owner arrange rain pipe 13 upper end and be located this owner and arrange the 113 lower extremes of rainwater pipe of rain pipe 13 upside and pass through flange sealing connection, and owner arranges rain pipe 13 lower extreme and is located this owner and arrange the 113 upper extremes of rainwater pipe of rain pipe 13 downside and pass through flange sealing connection. The water supply pipes 14 are provided with a plurality of water supply pipes 14, the plurality of water supply pipes 14 are respectively vertically arranged between the adjacent pipeline blocks 11, the upper ends of the water supply pipes 14 are connected with the lower ends of the water inlet pipes 114 positioned on the upper side of the water supply pipes 14 through flange sealing, and the lower ends of the water supply pipes 14 are connected with the upper ends of the water inlet pipes 114 positioned on the lower side of the water supply pipes 14 through flange sealing. In addition, the main drainage pipe 12 is communicated with an indoor drainage pipeline of a resident on the highest floor of the building, and the upper end of the highest main rain drainage pipe 13 extends to the roof and is communicated with a rain drainage pipeline of the roof. The water supply pipe 14 is closed at the upper end and communicated with the urban water supply system at the lower end, and the water supply pipe 14 is communicated with water pipelines in each layer of household rooms and used for improving domestic water for the household in the building.

The working principle of the water supply and drainage integrated module is as follows: when the main drainage pipe 12 on a certain floor is blocked, the main drainage pipe 12 which is blocked is dismantled outside the building after a maintenance person determines the blocking position and dredges the main drainage pipe 12, then the maintenance person installs the main drainage pipe 12 again to finish the dredging work, in the process, the indoor decorative surface of the lower-layer household does not need to be dismantled and damaged, the dredging work is carried out outside the building, and the lower-layer pollution is prevented.

Referring to fig. 1, a water supply and drainage system for a building includes a water supply and drainage integration module, a control valve assembly, and a sensing assembly 3, which is identical to the above-described water supply and drainage integration module. The control valve assembly is buried in the pipe block 11, and includes a first communication pipe 21, a first solenoid valve 22, a second communication pipe 23, a second solenoid valve 24, a third solenoid valve 25, a third communication pipe 26, and a fourth solenoid valve 27. The first communicating pipe 21 is in a circular pipe shape, the axis of the first communicating pipe is inclined, two ends of the first communicating pipe 21 are respectively communicated with the sewage pipe 112 and the rainwater pipe 113, and one end of the first communicating pipe 21 connected with the sewage pipe 112 is lower than one end of the first communicating pipe 21 connected with the rainwater pipe 113. The second communication pipe 23 is a circular pipe shape, the axis of the second communication pipe 23 is parallel to the axis of the first communication pipe 21, the second communication pipe 23 is disposed at the lower side of the first communication pipe 21, and both ends of the second communication pipe 23 are respectively communicated with the sewage pipe 112 and the rainwater pipe 113. The first solenoid valve 22 is fixedly installed at the middle of the first communication pipe 21, and opens and closes the first communication pipe 21. The second solenoid valve 24 is fixedly installed in the middle of the second communication pipe 23, and is used to open and close the second communication pipe 23. The third electromagnetic valve 25 is fixedly installed on the rainwater pipe 113, and the third electromagnetic valve 25 is disposed between the first communicating pipe 21 and the second communicating pipe 23 in the vertical direction, for opening and closing the rainwater pipe 113. The third communicating pipe 26 is a circular pipe shape, the axis thereof is horizontal, two ends of the third communicating pipe 26 are respectively communicated with the water inlet pipe 114 and the rainwater pipe 113, and the fourth electromagnetic valve 27 is fixedly installed on the third communicating pipe 26 for opening or closing the third communicating pipe 26.

Referring to fig. 1, the sensing assembly 3 includes a sensing slot 31, a detector 32, a controller 33, an electric button 34, and an LED lamp 35. The detection tank 31 is arranged on the bottom surface of the pipeline block 11, the opening of the detection tank 31 is rectangular, the detection tank 31 is communicated with the outer side wall of the sewage pipe 112, and the detection tank 31 is arranged on the lower side of the communication port of the second communication pipe 23 and the sewage pipe 112. The sensor 32 is an electromagnetic flow meter which is disposed in the sensing tank 31 and fixedly installed on the sewage pipe 112, and senses a flow direction of the sewage in the sewage pipe 112. The controller 33 is disposed in the detection tank 31 and fixed to the inner top surface of the detection tank 31, and the controller 33 is electrically connected to the detector 32, the first solenoid valve 22, the second solenoid valve 24, and the third solenoid valve 25. The electric button 34 is a commonly used reset switch button, and is disposed in the detection slot 31 and fixed to the inner top surface of the detection slot 31. The LED lamp 35 is a red lamp, and is disposed in the detection groove 31 and fixed to the inner top surface of the detection groove 31, and the lamp head of the LED lamp 35 penetrates through the opening of the detection groove 31. The power button 34 and the LED lamp 35 are electrically connected to the controller 33. Of these, only one controller 33 is provided, and the controller 33 is provided on the vertically innermost pipeline block 11.

The working process of the water supply and drainage system of the building comprises the following steps: when a certain main drainage pipe 12 outside the building is blocked, residents in the building still continuously discharge sewage into the main drainage pipe 12, so that the sewage level in the main drainage pipe 12 continuously rises, when the sewage level crosses a detector 32 on the upper side of the blocked main drainage pipe 12, the detector 32 detects a signal of reverse flowing of the sewage and transmits the signal to a controller 33, the controller 33 sends signals to a first electromagnetic valve 22, a second electromagnetic valve 24, a third electromagnetic valve 25 and an LED lamp 35, so that the second electromagnetic valve 24 nearest to the upper side of the blocked main drainage pipe 12 is opened, the first electromagnetic valve 22 nearest to the lower side of the main drainage pipe 12 is opened, the third electromagnetic valves 25 on the upper and lower sides of the main drainage pipe 12 are closed, and the LED lamp 35 on the upper side of the blocked main drainage pipe 12 is turned on, so that the reverse-poured sewage enters the main drainage pipe 13 through a second communication pipe 23 for opening the second electromagnetic valve 24, then the sewage is discharged into the sewage pipe 112 at the lower side of the blocked main drainage pipe 12 by opening the first communication pipe 21 of the first electromagnetic valve 22, and the blocked main drainage pipe 12 is bypassed, so that the sewage is prevented from continuously rising and flowing backwards into the building; after the dredging of the maintenance personnel is finished, the maintenance personnel presses an electric button 34 on the pipeline block 11 which is lighted by an LED lamp 35, and the electric button 34 sends signals to a controller 33, so that a third electromagnetic valve 25 which is positioned at the upper side of the electric button 34 and is nearest is opened, a third electromagnetic valve 25 which is positioned at the lower side of the electric button 34 and is nearest is closed, a first electromagnetic valve 22 which is positioned at the lower side of the electric button 34 and is nearest is opened, and a fourth electromagnetic valve 27 which is positioned at the upper side of the electric button 34 and is nearest is opened, so that high-pressure water in a water inlet pipe 114 is released into a rainwater pipe 113, and the rainwater pipe 113 and a main rainwater drainage pipe 13 which are contacted with sewage; when the service person releases the electric button 34, the controller 33 controls the fourth solenoid valves 27 to be closed, the respective third solenoid valves 25 to be opened, the respective first solenoid valves 22 to be closed, and the respective second solenoid valves 24 to be closed, so that the control valve assembly is restored to the original state.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A water supply and drainage integrated module is characterized in that: the building comprises pipeline blocks (11) fixed on the outer side wall of a building through concrete pouring, a plurality of sewage pipes (112), rainwater pipes (113) and water inlet pipes (114) which are horizontally arranged are embedded in the pipeline blocks (11), the pipeline blocks (11) are arranged on the same building, the pipeline blocks (11) are respectively aligned with each floor of the building, and a main drainage pipe (12) communicated with an indoor drainage pipeline of the building, a main drainage pipe (13) communicated with a roof drainage pipeline and a water supply pipe (14) communicated with an indoor water pipeline of the building are arranged between every two adjacent pipeline blocks (11); the two ends of the main drainage pipe (12) are respectively detachably connected with the end parts of the sewage pipes (112) on the adjacent pipeline blocks (11), and the main drainage pipe (12) is hermetically connected with the sewage pipes (112); the two ends of the main rain drainage pipe (13) are respectively detachably connected with the end parts of the rain pipes (113) on the adjacent pipeline blocks (11), and the main rain drainage pipe (13) is hermetically connected with the rain pipes (113); the two ends of the water supply pipe (14) are respectively detachably connected with the water inlet pipe (114) in the adjacent pipeline block body (11), and the water supply pipe (14) is connected with the water inlet pipe (114) in a sealing mode.

2. A water supply and drainage system for a building, comprising: the device comprises a water supply and drainage integrated module, a detection assembly (3) arranged on a pipeline block body (11) and a control valve assembly buried in the pipeline block body (11), wherein the control valve assembly comprises a first communicating pipe (21), a first electromagnetic valve (22) fixedly arranged on the first communicating pipe (21), a second communicating pipe (23) arranged on the lower side of the first communicating pipe (21), a second electromagnetic valve (24) fixedly arranged on the second communicating pipe (23) and a third electromagnetic valve (25) fixedly arranged on a rainwater pipe (113); two ends of the first communication pipe (21) are respectively communicated with the sewage pipe (112) and the rainwater pipe (113); two ends of the second communicating pipe (23) are respectively communicated with the sewage pipe (112) and the rainwater pipe (113); the third electromagnetic valve (25) is positioned between the first communicating pipe (21) and the second communicating pipe (23) along the length direction of the rainwater pipe (113); the detection assembly (3) comprises detection grooves (31) arranged on the bottom surface of the pipeline block body (11), detectors (32) which are arranged in the detection grooves (31) and used for detecting the flow direction of sewage in the sewage pipe (112), and a controller (33) which is arranged in one detection groove (31), wherein the detectors (32) are electrically connected with the controller (33), and the controller (33) is respectively electrically connected with the first electromagnetic valve (22), the second electromagnetic valve (24) and the third electromagnetic valve (25); when receiving the sewage reverse flow signal sent by the detector (32), the controller (33) sends signals to the first electromagnetic valve (22) which is positioned at the lower side of the detector (32) and is nearest, the second electromagnetic valve (24) which is positioned at the upper side of the detector (32) and the third electromagnetic valve (25) which is positioned at the upper side and the lower side of the detector (32), and controls the first electromagnetic valve (22) and the second electromagnetic valve (24) to be opened and controls the third electromagnetic valve (25) to be closed.

3. A water supply and drainage system for a building as claimed in claim 2, wherein: the detector (32) is an electromagnetic flowmeter, and the detector (32) is arranged on the lower side of the second communication pipe (23) closest to the detector (32) along the length direction of the sewage pipe (112).

4. A water supply and drainage system for a building as claimed in claim 2, wherein: an electric button (34) electrically connected with the controller (33) is fixed in the detection groove (31), and the controller (33) receives a signal of the electric button (34) and then controls the third electromagnetic valve (25) which is positioned at the upper side of the electric button (34) and is nearest to the upper side to be opened, controls the third electromagnetic valve (25) which is positioned at the lower side of the electric button (34) and is nearest to the lower side to be closed, and controls the first electromagnetic valve (22) which is positioned at the lower side of the electric button (34) and is nearest to be opened.

5. A water supply and drainage system for a building as claimed in claim 2, wherein: the first communicating pipe (21) and the second communicating pipe (23) are obliquely arranged, and one end, connected with the sewage pipe (112), of the first communicating pipe (21) is lower than one end, connected with the rainwater pipe (113), of the first communicating pipe (21); one end of the second communicating pipe (23) connected with the sewage pipe (112) is lower than one end of the second communicating pipe (23) connected with the rainwater pipe (113).

6. A water supply and drainage system for buildings as claimed in claim 4, wherein: the detection assembly (3) further comprises LED lamps (35) fixed to the bottoms of the pipeline blocks (11), the LED lamps (35) are electrically connected with the controller (33), and when the controller (33) receives a sewage reverse flow signal sent by the detector (32), the controller sends a signal to the LED lamp (35) closest to the detector (32), so that the LED lamps (35) emit light to prompt maintenance personnel of the blocking position of the main drainage pipe (12).

7. A water supply and drainage system for a building as claimed in claim 6, wherein: the control valve assembly further comprises a third communicating pipe (26) connected between the water inlet pipe (114) and the rainwater pipe (113) and a fourth electromagnetic valve (27) fixedly installed on the third communicating pipe (26), and the fourth electromagnetic valve (27) is arranged on the upper side of the third electromagnetic valve (25); the controller (33) is electrically connected with the fourth electromagnetic valve (27), and the controller (33) receives a signal of the electric button (34) and then controls the fourth electromagnetic valve (27) which is positioned in the same pipeline block body (11) with the electric button (34) to be opened.